Ments



(No Model.)

1:". W. GORDON. HOT BLAST STOVE.-

Patented May 22,1883,

[NVE/VTOR A TTORZVEY WITNESSES:

UNITED STATES PATENT OFFICE.

FREDRIOK W. eonnon, or PITTSBURG, PA., Assionon, BY MESNE Asstes MENTS, 'TO HIMSELF AND JAMES P. wirnnnow, or SAME PLACE.

HOT-BLAST S TOVE.

SPECIFICATION forming part of Letters Patent No. 278,234, dated May 22, 1881,

Application filed March 31, 1882.

(No model.)

To all whom it may concern Be it known that I, FRED. W. GORDON, of Pittsburg, Allegheny county, Pennsylvania, have invented certain new and useful Improvements in Hot-Blast Stoves, of which the following is a specification.

In the accompanying drawings, Figure l is a vertical section on line W, and Fig. 2 is a front elevation, part section, on line L.

This invention pertains to regenerative hotblast stoves. It relates to the form of the roof of the shell, to a diffusion arrangement for the gas and air of combustion, to the construction of the roof of the chamber at the foot of the regenerator-fiues, and to means for altering the relative areas ofthe final uptake and downtake of the regenerator.

It consists of a roof-sheetjoined to the top by a double miter, the arch of the roof-sheetbein g parallel to the internal archesover the combustion-chamber and regenerator; of a perforated arch near the bottom of the combustion chamber to separate the inlets ot' the gas and air of combustion; of a chamber at the foot of the regenerator, with a perforated arched roof formed by the lower termination of regenerator walls, and of a partition-wall in such chamber to divide said chamber and apportion said perforations in the roof between the apartments.

A regenerative hot-blast stove of the type to which my invention pertains generally consists of a vertical cylinder constructed of plateiron made air-tight against the usual pressures of hot blast, and provided with interior air and gas conduits, of brick or other refractory material, as hereinafter set forth. Such stoves are constructedas much as thirty feet in diameter, and designed to stand an internal air-pressure of about twenty pounds per square inch. Heretofore the roofs of such stoveshave been made fiat, and the proper strength secured by crossbeams of iron tied to the cylindrical portion of the shell. Such a construction is expensive, untidy, and not over strong. Another common form of construction is the dome-shaped or hemispherical roof, in which the metal is distributed exactly right to meet the internal strains. This construction, however, requires that theinetal be cut in forms involving much waste; that the flat sheet is simply mitered to the cylinder, as

shown, thus presenting a semicircular contour to one view and a square contour to the other view. Flat riveted work only is involved, and a theoretical analysis of the strains, as well as practical experience with the stoves, proves 6 the construction to be correct. The interior brick arches, D, have their axes parallel with the axis of the miter-roof.

G is the gas-inlet and hot-blast outlet.

Q is the chiinney-connection and cold-blast inlet.

H is the combustion-chamber. The gases and air-blast move through the stove as usual.

Heretofore the air required for combustion has been admitted into the combustiotrchaniher in a stream, or at various points in the path of the gas, or in a row ofjcts from a blastpipe in the combustion -chamher. By such means proper diffusion of the fluids has not been effected. In my construction I pass a horizontal stream of gas over a perforated brick surface, through which the air is drawn by natural draft. The perforations cause the air to difi'use into the entire area of the gas stream as presented to the brick surface.

I is the brick surface, with perforations J distributed over its surface.

K is the air'admission valve. The diffusion caused by this means is early aud,perfect. Obviously the gas might be admitted under the arch I and diffused into the air, which would in such case be admitted above the arch, the point being to separate the two incoming fluids by a horizontal surface, perforated so as to cause the under fluid to diffuse itself up into the other fluid in streams fairly distributed over the entire separating-surface. The valve K being used as a blow-off valve when the stove is taken off blast causes the out-current of'air to rush through the arch-ports J and cleanse them from deposits of gas-dirt.

Heretofore the regenerator walls of hotblast stoves have been borne by metal supports, or by piers and lintel-arches. The metallic supports give down under high heats, and the pier and lintel construction renders the base of the walls complicated and expensive and obstructs the cleaning-chambers. I constructmycleaning-chamber with an arched ceiling sprung from the main and dividing walls, and pierce this ceiling with openings to match the tlues of the regeuerator whereby the lines are continuous, and of brick, clear to the cleaning-chamber. I erect the wall P under the arch O, to divide the cleauing-chamher and divert the currents of gas or blast, as will be understood fromthe arrows. This wall bears noweight, and is removable, should it be desired to divide the regenerator diflerently, without disturbing the regenerator-walls. As

shown in the drawings, the gas is forced bywall P to confine its upward passage to the three sets of tlues 1t, and itreturns downward through the three sets of fines V. The expansion and contraction and friction in passage of hot gases through fines often involves experimental changes in the flue area i'or the gases at different stages of their progress. Moving wall I one section to the right would give the gases four sets of fines in the uptake and threein the final downtake. This feature of a removable non-supporting wall at the base of the regenerator can be embodied in stoves with numerously-subdivided uptakcs and downtakes in the regenerator.

The wall P can be torn down and rebuilt at any desired point without disturbing any other portion of the regenerator.

I claim as my invention- 1. The combination'of a cylindrical main wall, a vertical dividing-wall, parallel roofarehes over the apartments formed by the dividing-wall, a cylindrical metal shell. projecting on two opposite sides above said roofarches, and a shell-roof sheet with the axis of its arch parallel to the axes of said roof-arches, joined to said shell by a double miter, substantially as set forth.

2. In a hotblast stove, the combination of combustion chamber H, opening G, forming hot-air outlet and gas-inlet, perforated brick surface I J, and opening K, forming the blowoff and inlet for air to the gas, substantially as and for the purpose set forth.

3. The combination of the multiflue regenerator, having a base forming the perforated and arched ceiling of the base-chamber, and the non-supporting wall reaching from the iloor to the roof of said chamber, substantially as and for the purpose set forth.

FRED. \V. GORDON.

Witnesses: 1 J. M. ROURKE,.

J. I. \VITHEROW. 

